Payment Plugins for PayPal WooCommerce vulnerabilities

The Payment Plugins for PayPal WooCommerce WordPress plugin before version 2.0.27 does not verify that a PayPal order supplied in a payment request belongs to the WooCommerce order being paid unless that PayPal order has already been completed, allowing unauthenticated attackers to have another buyer's approved but uncaptured payment captured against an order of their own.

The Payment Plugins for PayPal WooCommerce WordPress plugin before version 2.0.26 does not verify that a stored payment method belongs to the user attaching it, allowing any authenticated user, such as a subscriber, to bind another customer's stored card to their own account and then charge or delete it. Exploitation requires the attacker to already know the payment provider's identifier for the victim's stored method, which the Payment Plugins for PayPal WooCommerce WordPress plugin before version 2.0.26 does not expose.

The Payment Plugins for PayPal WooCommerce plugin before version 2.0.26 does not validate the order key before adding order data to the JavaScript configuration output on the front end. This allows unauthenticated users to obtain the secret that gates access to any order and, through it, the customer's billing and shipping details, by iterating sequential order identifiers.

The Payment Plugins for PayPal WooCommerce WordPress plugin before 2.0.20 does not have proper authorization checks on a REST endpoint, allowing unauthenticated users to bypass payments.

The Payment Plugins for PayPal WooCommerce plugin for WordPress has a missing authorization vulnerability, allowing exploitation of incorrectly configured access control security levels. This issue affects versions up to and including 2.0.13.